Improved metal-clad artificial stone



F GOIGNET METAL GLAD ARTIFICIAL STONE.

No. 98,033. Patented Dec. 21., 1869.

U NITED STATES PATENT OFF-ICE.

FRANQOIS COIGNET, OF PARIS, FRANCE.

lMPR O VEDMETAL-CLAD ARTIFICIAL STONE.

Specification forming part of Letters Patent No. 98,033, dated December 21, 1969.

To all whom it may concern:

Be it known thatl, Fnnuqois'floronnr, of Paris, France, have invented certain new and useful Improvements in Metal-Clad Artificial Stones; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanyingdrawings forming part of this specification, in which- Figure 1 represents a cross-section of one of my improved metal-clad artificial stones. Fig. 2 represents a front View of the same. Fig. 3 is a perspective view of the shield B, and Fig. 4 represents, in -section,a mold, andthe process of manufacturing my improved stones.

This invention relates to that class of artiiicial stones which is manufactured by the agglomeration or agglutination of sand or other similar substances by a-suitable cementingmaterial; and my improvement consists in introducing, into the molds where such stones are cast, run, or packed in, proper shields, corners, bands, angles, &c., of metal, and in providing said corners, shields, bands, or angles with suitable clamps, hooks, bolts, &c., fastened to or making part of the same, so that the soft material of the artificial stone will run, be cast, or be packed around and against said hooks, bolts, or clamps, or dovetail projections, and against the inner side or face of the shield, angle, band, or corner-piece, in such manner that, when removed from the mold, I obtain a metal-clad artificial stone.

I will describe. the manufacture ofa curbstone by my improved process,'as any other stones used in the arts may readily be made by parties skilled in the art after such description.

; lhe metal border or an gle-iron piece which I employ is represented 'in Fig. 3, where I have shown the clamp-pieces'cc cc, which are fastened permanently to the angle-iron piece A. This may be made of iron, or of any other metal suitable for the purpose desired. '1 is the mold in which the curb-stone is to be shaped, and it is represented in crosssection in Fig. 4. The'angle-piece A is placed in the mold T, in one of its lower corners or edges, and presenting the clamps cc 0 upward and inward.

The artificial stone is now made in the ordinary manner, takingcare to have the material B well packed around and against the clamps c c c, &c., andthis is best done by repeated layers, carefully agglomerated according to my several modes of operation already described in former patents. When the mold is full-it is taken apartandthe stone, when hard, is turned over and presents the appean ance of Fig. 2-a perfect stone, protected at its angle or most exposed part by a metallic shield.

by metallic shields; but

What I do claim as my invention, and de sire to secure by Letters Patent of the United States, is-

1. Protecting the exposed corners, sides, edges, or angles of artificial stones by means and with the use of metallic shields fastened stone, substantially in the mannerherein set forth.

2. As anew article of manufacture, a metalclad artificial stone, made substantially as herein described, for building purposes, or other wants of the arts, industry, or commerce.

In testimony whereof I have signed my name to this specification before two subscribing witnesses.

FBANQOIS OOIGNET.

Witnesses:

EMILE BARRAULT,

AMART, 17 Bowl. St. Martin. Paris.

I do not claim as new the protecting of stone thereto in the process of manufacturing said 

